Patents by Inventor Chunhua Yang
Chunhua Yang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20210095678Abstract: An electric air pump for an inflatable product includes an air pump, a hand wheel switch, an air switching cylinder, a diverter, a check valve and an air pump assembly. A second vent of the hand wheel switch selectively communicates with the diverter through the air switching cylinder. The air pump assembly has a pump chamber, an air inlet and an air outlet. An air switching hole of the diverter can selectively communicate with the first accommodating chamber. By switching different airflow passages, the inflation and deflation efficiency can be improved, and the service life of the motor can be prolonged.Type: ApplicationFiled: September 30, 2019Publication date: April 1, 2021Inventor: Chunhua Yang
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Publication number: 20210090270Abstract: A method for detecting a flow velocity of a high-temperature molten fluid can include: collecting a video stream of a high-temperature high-velocity molten fluid, decomposing the video stream into a frame image sequence sorted by time, and extracting a molten fluid Region Of Interest (ROI) from the frame image sequence, extracting a molten fluid outline of the molten fluid ROI, and extracting a characteristic block of the molten fluid outline, and obtaining the flow velocity of the molten fluid based on the characteristic block. A flow velocity detection accuracy can be improved for a molten fluid with a high temperature, a high velocity and a high glossiness.Type: ApplicationFiled: July 16, 2019Publication date: March 25, 2021Applicant: CENTRAL SOUTH UNIVERSITYInventors: Zhaohui JIANG, Lei HE, Zhipeng CHEN, Weihua GUI, Dong PAN, Chunhua YANG, Yongfang XIE, Haifeng ZHANG
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Publication number: 20210022344Abstract: This invention relates to processes for the preparation of antiparasitic isoxazoline compounds enriched in an enantiomer using quinine-based chiral phase transfer catalyst. The invention also relates to novel quinine-based phase transfer catalysts and to a toluene solvent form of the isoxazoline compound of the invention.Type: ApplicationFiled: July 14, 2020Publication date: January 28, 2021Applicant: BOEHRINGER INGELHEIM ANIMAL HEALTH USA INC.Inventor: Chunhua Yang
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Publication number: 20210011275Abstract: A true-seeing infrared industrial endoscope endoscope includes an external shell protective unit including a housing and an electrical appliance component box connected to a rear end of the housing. A cavity of the housing is provided with a dual capturing-imaging unit including at least two capturing-imaging subunits. Each of the capturing-imaging subunits includes a light splitter, an image capturing lens, an infrared imaging tube, and a visible light imaging tube. The electrical appliance component box is provided with a communication module and a power supply electrically connected to the dual capturing-imaging unit and the communication module. The communication module is communicatively connected to the dual capturing-imaging unit and an upper computer via a communication bus, and the power supply is electrically connected to the dual capturing-imaging unit via a power bus.Type: ApplicationFiled: November 16, 2018Publication date: January 14, 2021Applicant: CENTRAL SOUTH UNIVERSITYInventors: Zhaohui JIANG, Jilin ZHU, Zhipeng CHEN, Weihua GUI, Yongfang XIE, Chunhua YANG, Haifeng ZHANG
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Patent number: 10750744Abstract: This invention relates to processes for the preparation of antiparasitic isoxazoline compounds enriched in an enantiomer using quinine-based chiral phase transfer catalyst. The invention also relates to novel quinine-based phase transfer catalysts and to a toluene solvent form of the isoxazoline compound of the invention.Type: GrantFiled: November 7, 2018Date of Patent: August 25, 2020Assignee: BOEHRINGER INGELHEIM ANIMAL HEALTH USA INC.Inventor: Chunhua Yang
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Patent number: 10716408Abstract: A housing of the air pump has a first air inlet, an air inlet passage, an inflation inlet, an air outlet passage and an air outlet. The motor has two output shafts, the first fan is connected with one of the output shafts and located at one end of the air inlet passage, and the second fan is connected with another output shaft and located at one end of the air outlet passage. The second and the first fans are configured to rotate at a same direction, and the inflation inlet is located between the first and the second fans. The first switch unit is adapted to connect or disconnect the first air inlet with the air inlet passage, and the second switch unit is adapted to connect or disconnect the air outlet with the air outlet passage. The air pump has simple structure, convenient control and low cost.Type: GrantFiled: November 1, 2019Date of Patent: July 21, 2020Assignee: DONGGUAN HONGSHENG METAL & PLASTIC TECHNOLOGY CO., LTD.Inventor: Chunhua Yang
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Publication number: 20200063745Abstract: A housing of the air pump has a first air inlet, an air inlet passage, an inflation inlet, an air outlet passage and an air outlet. The motor has two output shafts, the first fan is connected with one of the output shafts and located at one end of the air inlet passage, and the second fan is connected with another output shaft and located at one end of the air outlet passage. The second and the first fans are configured to rotate at a same direction, and the inflation inlet is located between the first and the second fans. The first switch unit is adapted to connect or disconnect the first air inlet with the air inlet passage, and the second switch unit is adapted to connect or disconnect the air outlet with the air outlet passage. The air pump has simple structure, convenient control and low cost.Type: ApplicationFiled: November 1, 2019Publication date: February 27, 2020Inventor: Chunhua Yang
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Patent number: 10433552Abstract: This invention relates to processes for the preparation of antiparasitic isoxazoline compounds enriched in an enantiomer using quinine-based chiral phase transfer catalyst. The invention also relates to novel quinine-based phase transfer catalysts and to a toluene solvent form of the isoxazoline compound of the invention.Type: GrantFiled: April 5, 2017Date of Patent: October 8, 2019Assignee: MERIAL, INC.Inventors: Chunhua Yang, Loic Patrick Le Hir de Fallois, Charles Q. Meng, Alan Long, Roelof Johannes Gorter de Vries, Bruno Baillon, Sylvaine Lafont, Myriam Gay de Saint Michel, Stephane Kozlovic
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Publication number: 20190133129Abstract: This invention relates to processes for the preparation of antiparasitic isoxazoline compounds enriched in an enantiomer using quinine-based chiral phase transfer catalyst. The invention also relates to novel quinine-based phase transfer catalysts and to a toluene solvent form of the isoxazoline compound of the invention.Type: ApplicationFiled: November 7, 2018Publication date: May 9, 2019Applicant: MERIAL INC.Inventors: Chunhua Yang, Loic Patrick Le Hir de Fallois, Charles Q. Meng, Alan Long, Roelof Johannes Gorter de Vries, Bruno Baillon, Sylvaine Lafont, Myriam Gay de Saint Michel, Stephane Kozlovic
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Publication number: 20170311601Abstract: This invention relates to processes for the preparation of antiparasitic isoxazoline compounds enriched in an enantiomer using quinine-based chiral phase transfer catalyst. The invention also relates to novel quinine-based phase transfer catalysts and to a toluene solvent form of the isoxazoline compound of the invention.Type: ApplicationFiled: April 5, 2017Publication date: November 2, 2017Applicant: MERIAL INC.Inventors: Chunhua Yang, Loic Patrick Le Hir de Fallois, Charles Q. Meng, Alan Long, Roelof Johannes Gorter de Vries, Bruno Baillon, Sylvaine Lafont, Myriam Gay de Saint Michel, Stephane Kozlovic
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Patent number: 9044453Abstract: This invention provides for novel antiparasitic and pesticidal forms of moxidectin, including a long-acting polymeric implant. The resulting compounds may be used in veterinary compositions which are used in treating, controlling and preventing of endo- and ectoparasite infections in animals.Type: GrantFiled: March 25, 2014Date of Patent: June 2, 2015Assignee: MERIAL, INC.Inventors: Susan Mancini Cady, Baoqing Ma, Robert Clark Chapman, Chunhua Yang, Uday Jain
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Publication number: 20140323559Abstract: This invention provides for novel antiparasitic and pesticidal forms of moxidectin, including a long-acting polymeric implant. The resulting compounds may be used in veterinary compositions which are used in treating, controlling and preventing of endo- and ectoparasite infections in animals.Type: ApplicationFiled: March 25, 2014Publication date: October 30, 2014Applicant: MERIAL LIMITEDInventors: Susan Mancini Cady, Baoqing Ma, Robert Clark Chapman, Chunhua Yang, Uday Jain
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Patent number: 8715711Abstract: This invention provides for novel antiparasitic and pesticidal forms of moxidectin, including a long-acting polymeric implant. The resulting compounds may be used in veterinary compositions which are used in treating, controlling and preventing of endo- and ectoparasite infections in animals.Type: GrantFiled: November 30, 2012Date of Patent: May 6, 2014Assignee: Merial LimitedInventors: Susan Mancini Cady, Baoqing Ma, Robert Clark Chapman, Chunhua Yang, Uday Jain
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Publication number: 20130143956Abstract: This invention provides for novel antiparasitic and pesticidal forms of moxidectin, including a long-acting polymeric implant. The resulting compounds may be used in veterinary compositions which are used in treating, controlling and preventing of endo- and ectoparasite infections in animals.Type: ApplicationFiled: November 30, 2012Publication date: June 6, 2013Applicant: Merial LimitedInventors: Susan Mancini Cady, Baoqing Ma, Robert Clark Chapman, Chunhua Yang, Uday Jain
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Publication number: 20120059190Abstract: The invention in one embodiment is directed to a method of preparing a compound of formula 1, or a pharmaceutically acceptable salt thereof, wherein R1 and R2 are each independently chosen from hydrogen, (C1-C6)alkyl, and cycloalkyl, R is —NR3R4, where R3 and R4 are each independently chosen from hydrogen, and (C1-C4)alkyl; and n ranges from 1-4, comprising: (a) reacting a C1-C12 alkyl nitrate with a compound of formula 2, or a salt thereof, in the presence of an acid at a concentration greater than 70% weight of acid/weight of solution, the acid being selected from the group consisting of sulfuric acid, and R5—SO3H wherein R5 is C1-C4 alkyl optionally substituted with one or more halogen, or R5 is C6-C10 aryl optionally substituted with one or more C1-C4 alkyl or halogen, to produce a reaction mixture containing a compound of formula 3 or a salt thereof; (b) reducing the compound of formula 3 or a salt thereof to form a compound of formula 4 or a salt thereof (c) acylating the compound of forType: ApplicationFiled: March 9, 2010Publication date: March 8, 2012Applicant: Wyeth LLCInventors: ChunHua Yang, John Leo Dillon, JR., Ramachandra Naik
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Patent number: 7339054Abstract: A process is provided for the preparation of branched-chain ribonucleosides of formula (I): from the 1,2-anhydroderivatives of formula (II). wherein PG is a hydroxyl protecting group, B is a purine or pyrimidine nucleobase, and R1 is C1-6 alkyl. The compounds of formula (I) are inhibitors of HCV polymerase useful in the treatment of HCV infection.Type: GrantFiled: February 6, 2004Date of Patent: March 4, 2008Assignee: Merck & Co., Inc.Inventors: Feng Xu, Matthew M Bio, Cameron Cowden, Kimberly A. Petrillo, J. Michael Williams, Chunhua Yang, Marjorie See Waters
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Publication number: 20070037771Abstract: A process is provided for the preparation of branched-chain ribonucleosides of formula (I) from the 1,2-anhydro derivatives of formula (II). The compounds of formula (I) are inhibitors of HCV polymerase useful in the treatment of HCV infection.Type: ApplicationFiled: February 6, 2004Publication date: February 15, 2007Inventors: Feng Xu, Matthew Bio, Cameron Cowden, Kimberly Petrillo, J. Williams, Chunhua Yang, Marjorie Waters
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Patent number: 7145490Abstract: An automatic gain control system comprises a number of variable gain stages connected in series and a number of sensors, the input of each sensor being connected to a respective output of the variable gain stages. The input of an analogue-to-digital converter is connected to the output of one of the variable gain stages. The input of a control unit is connected to the outputs of the sensors and to the output of the analogue-to-digital converter. The input of a digital-to-analogue converter is connected to the output of the control unit, and the control inputs of each of the variable gain stages is connected to an output of the digital-to-analogue converter. The outputs of the digital-to-analogue converter are used to control the gains of the variable gain stages. Also disclosed is a method for automatically controlling gain in a receiver system.Type: GrantFiled: July 18, 2005Date of Patent: December 5, 2006Assignee: Oki Techno Centre (Singapore) Pte LtdInventors: Chunhua Yang, Theng Tee Yeo, Masayuki Tomisawa
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Publication number: 20060071841Abstract: An automatic gain control system,comprises a number of variable gain stages connected in series and a number of sensors, the input of each sensor being connected to a respective output of the variable gain stages. The input of an analogue-to-digital converter is connected to the output of one of the variable gain stages. The input of a control unit is connected to the outputs of the sensors and to the output of the analogue-to-digital converter. The input of a digital-to-analogue converter is connected to the output of the control unit, and the control inputs of each of the variable gain stages is connected to an output of the digital-to-analogue converter. The outputs of the digital-to-analogue converter are used to control the gains of the variable gain stages. Also disclosed is a method for automatically controlling gain in a receiver system.Type: ApplicationFiled: July 18, 2005Publication date: April 6, 2006Inventors: Chunhua Yang, Theng Yeo, Masayuki Tomisawa
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Publication number: 20050259768Abstract: A digital receiver for a burst-mode wireless communication system, such as a Bluetooth system comprises a radio frequency input stage for receiving an input signal and an analogue-to-digital converter for converting the input signal from an analogue signal to a digital signal. A switch is coupled to the analogue-to-digital converter and a first signal processor is coupled to the switch and is arranged to demodulate signals modulated according to a first modulation process, such as a GFSK modulation process. A second signal processor is also coupled to the switch and is arranged to demodulate signals modulated according to a second modulation process, such as ?/4DQPSK modulation process or an 8DPSK modulation process. The switch is arranged to switch the digital signal between the first and second signal processors to recover signals from the first and/or the second modulation process. A method for processing received signals in a burst-mode wireless communication system is also disclosed.Type: ApplicationFiled: May 16, 2005Publication date: November 24, 2005Inventors: Chunhua Yang, Theng Yeo, Masayuki Tomisawa